Running Air Conditioner Via Inverter while Towing/Driving

[StartingNewChap]

I am considering buying a 3000 watt inverter for my travel trailer. I would like to run my air conditioner whiling driving to my destination. My hope is that short stops for lunch can be accomplished in a comfortable trailer. The specs on my 20 amp air conditioner states is uses about 2700 watts to start then 1300 to run. I have 270AH batteries that I hope will supplement the startup power needed. I am wondering will my alternator on my Jeep Grand Cherokee provide enough power to run the tow vehicle, run the air conditioner and charge the Jeep and trailer batteries? I could not find any definitive answers from Jeep.

[Chum_lee]

NRALIFR wrote: "Don’t doubt a determined fabricator."

Somehow, . . . . . . I believe you! There could be a new reality TV show here somewhere. I've always liked people with an attitude like yours. Make America Great Again! (Re)Build it from the ground up.

Chum lee

[dougrainer]

NRALIFR wrote:

dougrainer wrote:

NRALIFR wrote:
I understand they make these neat things called “generators”.

Honda, Yamaha, Champion , etc.

I’d check into one.

:):)

Yes, if he had a truck. He has a Jeep. No place to store/mount the genset. Doug

Baloney. I could make a place for it. Probably quicker and cheaper than what he’s proposing.

This came out of my sick mind.



And this.



Don’t doubt a determined fabricator.

:):)

You must be delusional. The OP has a GRAND CHEROKEE, NOT a Truck. Besides, I want YOU in front of me if I rear end you with 10 gallons of gasoline sticking out the back of your truck. I would bet, Having Gasoline mounted like you have must be a violation of some Law, as long as being plain stupid. Ever hear of the Ford Pinto:h Doug

[Dtank]

2oldman wrote:

MrWizard wrote:
Isn't that 400 ampHr of 48v, which is equal to 1600 ampHrs of 12v
A/C using 1200w the 800w of solar is Not going to keep up with energy use
1/3 of the needed energy will come from the batteries, but You have a surplus of battery power
The OP does not

No. It's 100ah @ 48v. I don't expect solar to keep up. The a/c is cycling.

Maybe the OP should take up cycling!!.

.

[2oldman]

MrWizard wrote:
Isn't that 400 ampHr of 48v, which is equal to 1600 ampHrs of 12v
A/C using 1200w the 800w of solar is Not going to keep up with energy use
1/3 of the needed energy will come from the batteries, but You have a surplus of battery power
The OP does not

No. It's 100ah @ 48v. I don't expect solar to keep up. The a/c is cycling.

[Veebyes]

All of this to eat lunch in the cool! !!!!

[MrWizard]

Isn't that 400 ampHr of 48v, which is equal to 1600 ampHrs of 12v
A/C using 1200w the 800w of solar is Not going to keep up with energy use
1/3 of the needed energy will come from the batteries, but You have a surplus of battery power
The OP does not

[2oldman]

I do this with 400ah of battery fed by 800w of solar.

[NRALIFR]

dougrainer wrote:

NRALIFR wrote:
I understand they make these neat things called “generators”.

Honda, Yamaha, Champion , etc.

I’d check into one.

:):)

Yes, if he had a truck. He has a Jeep. No place to store/mount the genset. Doug

Baloney. I could make a place for it. Probably quicker and cheaper than what he’s proposing.

This came out of my sick mind.



And this.



Don’t doubt a determined fabricator.

:):)

[John_Wayne]

A portable generator on the trailer is about then only way. One 3000w or two 2000w

[dougrainer]

NRALIFR wrote:
I understand they make these neat things called “generators”.

Honda, Yamaha, Champion , etc.

I’d check into one.

:):)

Yes, if he had a truck. He has a Jeep. No place to store/mount the genset. Doug

[NRALIFR]

I understand they make these neat things called “generators”.

Honda, Yamaha, Champion , etc.

I’d check into one.

:):)

[dougrainer]

StartingNewChapter wrote:
I am considering buying a 3000 watt inverter for my travel trailer. I would like to run my air conditioner whiling driving to my destination. My hope is that short stops for lunch can be accomplished in a comfortable trailer. The specs on my 20 amp air conditioner states is uses about 2700 watts to start then 1300 to run. I have 270AH batteries that I hope will supplement the startup power needed. I am wondering will my alternator on my Jeep Grand Cherokee provide enough power to run the tow vehicle, run the air conditioner and charge the Jeep and trailer batteries? I could not find any definitive answers from Jeep.

The answer to your question is NO. Read MEXICOWANDERER. He is correct. There is no free lunch or Power. Inverters require a LOT of power and battery banks to run a AC. Even 500k Diesels with up to 6 to 8 batteries do not connect the Roof AC's to an Inverter. They could but it is not practical. Doug

[dougrainer]

MEXICOWANDERER wrote:
The proper way to do this is way way way too advanced to make it practical.

1st LEECE NEVILLE 260-amp alternator READ 260+ amps

2nd A nightmare of mounting brackets that have to be ABSOLUTELY straight and true

3rd Drive belt or pulley changeover to drive 10 horsepower. $$$$$$$$

4th OO -
2/0 cables from alternator output studs through 200 amp breaker under chassis, sheathed in protector tubing to a pair of one contact 200 amps truck and trailer big rig sockets. NEGATIVE must be done the same way -- 2/0

Then straight to ANOTHER breaker then tied directly to the batteries that feed the inverter. Not straight to the inverter as an isolated power feed. Have problems and a flickering isolated/dedicated feed line to the inverter it will fail the inverter sure as hell.

How do I know all this?

A very wealthy customer had me and a precision machine shop do it thirty years ago. Brackets and pulleys alone cost nine hundred dollars. And the machinist ****** about the number of hours. It turned out to be an almost four thousand dollar modification. thirty years ago. He paid eleven hundred dollars for the alternator alone.

And I swore NEVER AGAIN.

After fifteen or twenty trouble-free years I lost track of the owner.

Ridiculous.

OR, The simplest response is the problem of getting the Engine Alternator power to the REAR of the truck and then connected to the Trailer. You will need large battery cables both negative and Positive to keep the Trailer batteries up and supply enough power to run a AC unit thru the Inverter. You cannot connect this thru the standard 7 way Bargman trailer plug system. Doug

[MEXICOWANDERER]

The proper way to do this is way way way too advanced to make it practical.

1st LEECE NEVILLE 260-amp alternator READ 260+ amps

2nd A nightmare of mounting brackets that have to be ABSOLUTELY straight and true

3rd Drive belt or pulley changeover to drive 10 horsepower. $$$$$$$$

4th OO -
2/0 cables from alternator output studs through 200 amp breaker under chassis, sheathed in protector tubing to a pair of one contact 200 amps truck and trailer big rig sockets. NEGATIVE must be done the same way -- 2/0

Then straight to ANOTHER breaker then tied directly to the batteries that feed the inverter. Not straight to the inverter as an isolated power feed. Have problems and a flickering isolated/dedicated feed line to the inverter it will fail the inverter sure as hell.

How do I know all this?

A very wealthy customer had me and a precision machine shop do it thirty years ago. Brackets and pulleys alone cost nine hundred dollars. And the machinist ****** about the number of hours. It turned out to be an almost four thousand dollar modification. thirty years ago. He paid eleven hundred dollars for the alternator alone.

And I swore NEVER AGAIN.

After fifteen or twenty trouble-free years I lost track of the owner.

Ridiculous.

[DrewE]

cpaulsen wrote:
Why run the trailer ac going down the road?

The original poster mentioned wanting to eat lunch in a comfortably cool trailer for a quick stop along the road; that's one reason it may be wanted to run the air conditioner in the RV while traveling, and not entirely unreasonable.

A second is that it can take a good length of time to cool down once one reaches one's destination if traveling in quite hot conditions, and having a "head start," so to say, helps with that a lot.

I suppose a third might be if one's carrying something temperature sensitive in the RV, such as a pet. (Yes, you can argue that it's usually more appropriate to carry a pet in the tow vehicle, but there may well be reasons why that's impractical.)